Background
Static anterior tibial translation (ATT) is a common residual finding after anterior cruciate ligament (ACL) reconstruction, reflecting persistent tibiofemoral malalignment. However, the direct relationship between ATT and comprehensive functional performance outcomes remains unclear.
Objectives
To analyze the relationship between ATT and functional performance outcomes in patients following ACL reconstruction.
Study design
This retrospective study included 47 patients who underwent primary single-bundle ACL reconstruction using autologous hamstring tendons. Postoperative ATT was measured from MRI scans. Functional performance was assessed using the Y-balance test (YBT), hop tests, and isokinetic strength testing, with results expressed as the Limb Symmetry Index (LSI). Correlations between ATT and LSI scores were analyzed, and outcomes were compared between patients with lateral ATT ≥6mm and <6mm.
Results
Both medial and lateral ATT showed significant negative correlations with the posteromedial LSI of the YBT (r=-0.312, P=0.035; r=-0.297, P=0.046). No significant correlations were found with other functional tests. Furthermore, no significant differences in functional outcomes were found between the 22 patients with lateral ATT ≥6mm and the 25 with lateral ATT <6mm.
Conclusion
Postoperative ATT negatively affects the posteromedial aspect of balance. However, a lateral ATT greater than 6mm is not significantly associated with most functional performance outcomes.
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